Boiler-furnace



(No Model.) 2 Sheets-Sheet 1.

' O. A. ANDERSON.

BOILER FURNACE.

. No. 547,107. I Patented 001;. 1, 1895.

ANDREW B GRAHAM,PHOTOiJHQWASHINGTOND I:

(No Model.) I 2 Sheets-Sheet 2.

O.A.ANDERSON. BOILER FURNACE.

No. 547,107. Patented Oct l, 1895.

ANDREW 5.6RAHAM, PHOTO-H1110 wnsmmrmu' D t:

Units rates Pant CHRISTIAN A. ANDERSON, OF KAUKAUNA, WISCONSIN.

BOILER- FURNACE.

SPECIFICATION forming part of Letters Patent No. 547,107, dated October1, 1895.

Application filed April 15, 1893. Renewed March 30, 1895- Serial No.543,909- (No model.)

To all whom it may concern.-

Be it known that I, CHRISTIAN A. ANDER- SON, a citizen of the UnitedStates, residing at Kaukauna, in the county of Outagamie and State ofWisconsin, have invented a new and useful Improvement in Boiler-FurnaceSettings, of which the following is a specification. My inventionrelates to the arrangement in two horizontal planes in a furnace of twoor more boilers for the purpose of making steam for heating purposes orforproducing motive power, either two or three boilers being adapted forthe arrangement, and the boiler or the boilers, if there are three inthe nest in the lower one of said planes, being arranged for receivingthe entire heat arising from the combustion of the fuel directly underand through the tubes thereof, the other boiler being located in thehigher plane and receiving the heat remaining unexpended after it haspassed under and through the tubes of the boiler or the boilers of saidlower plane. The boiler of the higher plane is supplied with water fromany available source, which water is heated therein to a high degree oftemperature, after which it is delivered to the boiler or the boilers ofsaid lower plane, and the object of this arrangement is to utilize tothe greatest extent possible the heat of the fuel which is burned, andalso to supply the steam-making boiler or boilers of the lower planewith water of a high degree of temperature and from which the lime orother mineral impurities have been removed. I attain these objects bymeans of the arrangement of the boilers in a furnace-setting asillustrated in the accompanying drawings, in which- Figure 1 is an endview of three boilers in a furnace embodying my improvement, theboiler-front and the front of the breeching of all of the boilers beingremoved and only the brickwork of the furnace-wall being shown from apoint just below the bridge-wall to its top. Fig. 2 is a longitudinalelevation of the boiler-setting as it appears in looking at it towardthe left from the line a a of Fig. 1, a portion of the boiler-front andof the bridge-wall with a grate-bar extending from one to the otherbeing shown and a portion of the breeching and of the brickwork of thefurnace-wall being broken away for the purpose of a better illustrationof the several parts. Fig. 3 is an end view of the improvement havingbut two boilers in the furnace, the boiler-front and the front of thebreeching of the two boilers being removed. Fig. 4. is a longitudinaland vertical section of the two boilers and their setting, taken uponthe line b b of Fig. 3. Figs. 5 and 6 are upon a reduced scale, Fig. 5being an end view of the upper boiler-supporting casting as shown inFig. 1, and Fig. 6 is a vertical section longitudinally of a portion ofeach end of said casting as seen in looking toward the left of the line0 c of Fig. 5.

Similar figures of reference indicate like parts in the several views.

1 1 indicate the brick walls of the furnace immediately about the sidesof the lower boilers; 2 2, the walls about the rear end of said furnace;3, the lower boilers; 4 4c, the upper boilers; 5, bridge-walls; 6,boiler-fronts; 6', a door of the front; 7, grate-bars; 8, brackets whichare secured to the lower boilers for supporting them upon the side wallsof the furnace; 9, a series of tubes which extend lengthwise of thelower boilers from end to end; 10, fire-chambers under each lowerboiler; 11, flues extending from said fire-chambers to the rear end ofeach lower boiler for carrying off the products of combustion; 12,return-flues at the rear end of each lower boiler for conducting saidproducts of combustion to the tubes 9; 13, a flue which extends underthe upper boiler lengthwise thereof for receiving said products; 14, abreeching for receiving said products from the tubes 9 and conductingthem into the due 13; 15, a series of lines arranged in the upper boilerand extending from one end thereof to the other; 16, a return-flue atthe rear end of the upper boiler for conducting the heat, &c., from thefine 13 to the series of flues 15; 17, a breeching at the front end ofthe upper boiler for conducting the remaining heat and smoke to thechimney; 18, the base of a casting having curved sides 18', a straightcentral fiue-dividing plate 18", and cars 18 upon each side of the upperedge of said plate for supporting the upper boiler upon and for formingwithin its curved sides the flue 13; 19, safety-valves arranged upon theseveral boilers; 19', pipes for connecting said valves to the boilers;19", steam-escape pipes; 20 20, steam-delivery pipes for carrying thesteam from the boilers;

21, a drum or pipe connecting the pipes 20 of the boilers in Figs. 1 and2; 22, a watersupply pipe for supplying the upper boiler with water; 23,a pipe connecting the upper to the lower boiler for delivering waterfrom the former to the latter; 2t, blow-off pipes extending from thelower part of each boiler; 25 25, brackets secured to the upper boilersfor supporting them; 26, iron pillars within the side walls of thefurnace in Figs. 3 and 4, upon which the upper boiler is supported; 26,iron rods connecting each pair of said pillars for preventing thepillars from spreading apart; 27, manhole-plates upon the severalboilers; 28, hand-hole plates upon the upper boilers.

The important features of my improvement are the arrangment of thecombustion-chamher under the lower boiler or boilers,the flue leadingtherefrom, the return-flue at the rear end of the furnace, the series oftubes 9, the breeching connecting with said tubes at the front of theboiler, the flue under the upper boiler, the return-flue at the rear endof the upper boiler, the flues through the upper boiler, and thebreeching at the front end of the upper boiler leading to the chimney,in connection with a watensupply for the several boilers in the ordershown and the delivery of steam from the lower boiler or boilers.

The boiler or boilers of the lower plane are arranged within brick wallsand are provided with the usual boiler-front, supporting-brackets,grates, and bridge-wall, each one being inclosed with aside wall itsentire length, whereby the combustionchamber and flue leading therefromare separated from those of the other from one end of the furnace to theother. After the heat from the burning fuel has passed under the boilersof the lower plane it ascends and passes through the tubes 9 and thenceunder the boiler of the upper plane. A flue-division plate 18 isprovided in the arrangement shown in Figs. 1 and 2 fordividing the flueunder the upper boilerinto two equal parts longitudinally of the boiler.This division-plate is only used when there are two boilers in the lowerplane and is for the purpose of keeping the products of combustion fromeach of said boilers separate from each other until they have nearlyreached the rear end of the upper boiler. Fair results may be obtainedif the heat from the two boilers is merged into a single flue; but thedivided fine is preferable.

It is often necessary in running the boilers to sweep out the fines inorder to secure a perfect draft, and for doing this to one boilerwhile-the other one is kept running the divided flue is desirable. Theflue-dividing plate may be cast in sections longitudinally of the boilerand its base provided with arms extending upward, upon the upper end ofwhich arms the upper boiler is supported by means of brackets 25, whichbrackets are secured to the boiler. The outer arms 18 are concave inform upon their inner sides and form the inclosing sides of the flueunder the upper boiler and may be lined with brick, lireclay, or otherdesired lining; The central division-plate is provided with cars 18" forthe boiler to rest upon.

Vhere there is but one boiler in the lower plane, the upper one requiresno flue-division and may be supported upon brick walls, as shown inFigs. 3 and 4.. Brick walls may also be used for supporting the upperboiler when there are two boilers in the lower plane by placing thelower boilers at a sufficient distance apart for allowing the necessarysupporting-walls for the upper boiler.

In Figs. 3 and 4 pillars 26 are shown for supporting the upper boilerand its side walls. These pillars may be provided with bases for restingupon a suitable foundation and each pair of pillars may be connectedtogether with bolts 26 within the brick walls, as shown, for the purposeof strengthening said walls. Brackets 25, which are secured to theboiler 4, rest upon the pillar-tops and support said boiler. The fine 13is formed under the boiler 4' by means of the brick side walls and abrick filling underneath the boiler. An arch is turned below the flue13, but is only for the purpose of lessening the number of brick whichare required for the furnace-wall.

I do not confine my invention to the form of the upper-boilersupportswhich are shown, to the particular arrangement of the boilersupportingwalls, or to any particular material for their construction. The upperand lower boilers are shown with their ends uneven with each other; butthis is not a necessary element of their position, they being soillustrated for the easier distinguishing of the upper from the lowerone.

The fines for the return of the heat, dsc, from below the boiler orboilers of the lower plane into the tubes thereof are made separate fromeach other and also separate from the return-fines of the upper boiler.A plate 12' is provided, which extends transversely of said boiler orboilers the necessary distance and from the rear boiler-wall to saidboileror boilers, to which they may be removably connected by restingupon a bar 12", which bar may be secured to the boiler in any suitablemanner. These plates form the top of the return-fines at the rear end ofthe furnace. Similar plates 16 are provided for the closing of the topsof the return-flue at the rear of the upper boiler.

At the front end of the boilers a breeching 14 or 14' is provided forconducting the heat, &c., from the tubes of the lowerboiler or boilersunder the boiler of the upper plane, and also a breeching 17 forconducting the smoke, &c., from the fines of the upper boiler to thechimney.

In Fig. 1 the division-plate 18 with its base 18 is extended forward thenecessary distance for connecting with the breeching 14; for conductingthe heat, &c., underthe upper boiler, and it may be extended at the rearin Fig. 2 for forming the bottom of the return for said heat, or saidreturn may have its bottom and sides built up of brick.

The upper boiler is to be supplied with water from some suitable sourcethrough the pipe 22 by means of a pump or suitable device, the time andamount of said supply being regulated by means of the valve 22'. Thisboiler is to be kept full or nearly full at all times and the boiler orboilers of the lower plane supplied from it through the pipes 23, saidpipes being provided with valves 23 for shutting off the supply, asdesired. Theupperboilerbeingconnected with the lower ones only by thepipe 23, which pipe extends from out of the upper side of the boiler,said boiler must be full and sufficient pressure applied so that thewater will overflow and supply the lower boiler or boilers. The upperboiler being large and used for heating the water to a high degree oftemperature before delivering it to those upon the lower plane, the limeand other mineral impurities have ample time to become separated fromthe water therein, whereby water of a pure quality and high degree oftemperature is provided for the supply of the steamproducing boiler 0rboilers.

The lower boilers may be provided with tubes 9, as shown, or with finesof alarge size, the small tubes being preferred for their betterdistribution of heat, and as the water therein is comparatively free ofscale-producing material after it has passed through the upper boiler nodifficulty is likely to occur from that source.

The upper boiler I make with large flues, the area of which, it isessential, equals or exceeds the combined area of the tubes or fines inthe boiler or boilers of the lower plane. These Flues being large and ofthe necessary distance apart, they can be reached by the boiler'cleanerupon their entire surface for removing any scale which may form.

Steam is taken from the lower boiler or boilers through the pipes 20 or20, from which it can be delivered to the desired point. Two boilersbeing used in the lower plane, the pipes 20 20 are connected with alarger pipe or drum 21, from which the pipe 21 extends for carrying thesteam where desired.

Each boiler is provided with a safety-valve 19 and blow-off pipe 24:,which latter may have valves at a convenient point outside of theboiler-wall.

Having described my invention, what I claim, and desire to secure byLetters Patent, 1s

1. The combination in a boiler furnace setting of a nest of boilers ofapproximately equal length arranged parallel with each other in twohorizontal planes of different elevation,each boiler of the lower planebeing arranged in a diagonal direction from a boiler in the upper plane,those in the lower plane being provided with a series of comparativelysmalltubes arranged longitudinally' thereof, and the boiler of the nestin the upper plane having flues similarly arranged of a larger size thanthe aforesaid tubes, said boilers being so arranged that the heat andgases first pass under the boiler, or boilers, of the lower plane, thenreturn through the tubes thereof, then pass under the boiler of saidnestin the upper plane, returning then through the fines thereof to thefront of the boilers, and then pass into the chimney, the boiler of theupper plane being provided with a water supply and being used as a waterheater, the water from which after being heated is conducted to andsupplies the boiler, or boilers, of said lower plane, substantially asdescribed.

The combination in a boiler furnace setting, of a nest of boilers ofapproximately a uniform length, arranged parallel with each other inhorizontal planes of different elevation, each boiler of the lower planebeing arranged in' a diagonal direction from a boiler in the upperplane, the boiler of the nest in said upper plane having a series oflines extending from end to end thereof, and communicating at their rearends with a line extending longitudinally with, and under said boiler toits front end, and at their front ends communicating with a breechingfor carrying the smoke, &c., from said fines to a chimney, said boilerbeing provided with a water supply pipe, and with a Water delivery pipeextending from the top of said boiler to a boiler, or to the boilers, ofsaid lower plane, each boiler of said lower plane being provided with aseries of tubes extending longitudinally from end to end thereof, andwith a boiler wall upon two sides thereof, extending from the front tothe rear of the furnace, and having also a boiler front, a bridge wall,and grate bars extending from said front to the bridge wall, and formingthereby, a fire or combustion chamber, under each boiler of said lowerplane, a flue extending from said chamber toward the rear end of thefurnace and communicating with a series of tubes of the boiler over saidflue, a breeching at the front end of said boiler for conducting theproducts of combustion from said tubes to the afore' said flue which isarranged under the boiler of the upper plane, and a steam delivery pipeextending from the boiler, or boilers, of said lower plane,substantially as set forth.

3. The combination in a boiler furnace setting, of a nest of boilers ofapproximately a uniform length, arranged parallel with each other inhorizontal planes of different eleva tion, one boiler of the nest lyingin the upper plane, and one upon each side thereof in a diagonaldirection, lying in the lower plane, the boiler of said upper planehaving aseries of fines extending from end to end thereof andcommunicating at their front ends with a breeching for conducting theproducts of combustion from said fines to a chimney, and at their rearends communicating with a flue extending longitudinally with, and undersaid boiler to its front end, said boiler being provided with a watersupply pipe, and with a water delivery pipe extending from the top ofsaid boiler to each boiler of said lower plane, each boiler of saidlower plane being provided with a series of tubes extendinglongitudinally from end to end thereof, a boiler wall upon two sides ofeach boiler extending from the front to the rear of the furnace, andhaving also, a boiler front, a bridge wall, and grate bars extendingfrom said front to the bridge wall, and forming thereby, a fire orcombustion chamber, under each boiler of said lower plane, a fiueextending from said chamber toward the rear end of the furnace andcommunicating with the series of tubes of the boiler over said line, abreeching at the front end of each of said boilers for conducting theproducts of combustion from said tubes to the aforesaid flue which isarranged under the boiler of said upper plane, and a steam delivery pipeextending from each boiler in said lower plane, substantially asdescribed.

4. The combination in a boiler furnace setting, of a nest of boilers ofapproximately a uniform length, arranged parallel with each other inhorizontal planes of different elevation, one boiler of the nest lyinginthe upper plane, and one upon each side thereof in a diagonal direction,lying in the lower plane, the boiler of said upper plane having a seriesof tlucs extending from one end thereof to the other, and communicatingat their front ends with a breeching for conductingthe products ofcombustion from said fines to a chimney,

and at their rear ends communicating with a flue extendinglongitudinally with, and under said boiler to its front end, said lastnamed flue being divided by a vertical partition which is arranged undersaid boiler, and extends from near the rear end of said boiler to thefront of its breeching at the front end thereof, said boiler beingprovided with a water supply pipe, and with a water delivery pipeextending from the top of said boiler to each boiler of said lowerplane, each of said latter boilers being provided with a series of tubesextending longitudinally from end to end thereof, a boiler wall upon twosides of each boiler extending from the front to the rear of thefurnace, and having also a boiler front, a bridge wall, and grate barsextending from said front to the bridge wall, and forming thereby, afire 0r combustion chamber, under each boiler of said lower plane, afine extending from said chamber toward the rear end of the furnace andcommunicating with the series of tubes of the boiler over said flue, abreeching at the front end of each boiler for conducting the products ofcombustion from the tubes thereof to one division of the divided finewhich is arranged under the boiler of the aforesaid upper plane, and asteam delivery pipe extending from each boiler in said lower plane,substantially as set forth.

CHRISTIAN A. ANDERSON. Vitnesses:

LovEL SrowE, MARY IIALVERSON.

